Execute sql error


Sometimes when I execute a sql, has not returned the results, as shown below:

At this point when I refresh Immerse again, it reported “unable to connect to Hostname or Port”! The error shown is shown below:

This time I had to restart the MapD server, re-enter Immerse and the implementation of the same sql statement, actually able to perform success and return the results, the results shown below:
Who can help with this problem? Thank you!



At the point you see the “Unable to connect to hostname or port” my suspicion is that the mapd server has crashed, please review the mapd_server.INFO log and jounrnalctl mapd_server (assuming you are running via systemd) to see what error message is being reported.

Please include the log and the error messages to help us debug.